feat(client): 库存卡片显示单价（进价）+ 成本按角色隐藏

- 手机库存卡副行追加进价（编号 · 规格 · ¥xxx），仅管理员可见
- 宽屏成本价/总价列、货值 KPI、商品抽屉成本行对非管理员隐藏（isAdminProvider）
- m-inventory 原型同步 + 移动 golden ×6 重录（管理员形态基准）

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JJ1g8XV1YhhmHRzhwWEW7o

.superpowers/prototype/screens/m-inventory.html

@@ -57,7 +57,7 @@ function render(){
   if(!rows.length){ L.innerHTML=`<div class="m-empty"><svg viewBox="0 0 24 24"><use href="#i-box"/></svg>没有匹配的商品 · 调整筛选或搜索</div>`; return; }
   L.innerHTML=rows.map((it,i)=>`<a class="m-card" onclick="openItem(${ITEMS.indexOf(it)})">
     <div class="m-row">
-      <div class="mc-main"><div class="mc-nm">${it.name}</div><div class="mc-sub">${it.code} · ${it.spec}</div></div>
+      <div class="mc-main"><div class="mc-nm">${it.name}</div><div class="mc-sub">${it.code} · ${it.spec} · ${it.cost}</div></div><!-- 单价=成本进价，仅管理员可见（2026-07-06） -->
       <div class="mc-right"><span class="badge b-${it.status}">${it.status}</span><span class="mc-amt"><span class="${it.qty<=10?'qty-low':''}">${it.qty}</span> ${it.unit}</span></div>
       <div class="mc-chev"><svg viewBox="0 0 24 24"><use href="#i-chevron-right"/></svg></div>
     </div>

client/lib/screens/inventory/inventory_list_screen.dart

@@ -5,6 +5,7 @@ import 'package:lucide_icons_flutter/lucide_icons.dart';
 import '../../core/responsive/responsive.dart';
 import '../../core/theme/context_tokens.dart';
 import '../../core/theme/app_dims.g.dart';
+import '../../core/auth/auth_state.dart';
 import '../../core/storage/column_prefs.dart';
 import '../../core/utils/export_util.dart';
 import '../../models/inventory.dart';
@@ -114,12 +115,17 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
     );
   }
 
+  // 成本仅管理员可见（与出库同口径）：非管理员隐藏成本价/总价列、卡片单价、货值 KPI。
+  bool get _isAdmin => ref.watch(isAdminProvider);
+  bool _colAllowed(ColDef c) =>
+      _isAdmin || (c.key != 'cost' && c.key != 'price');
+
   // ── 列设置（原型 colBtn → openColMenu：多选保持打开） ──
   void _openColMenu(BuildContext anchorContext) {
     showDsMultiMenu<String>(
       anchorContext,
       itemsBuilder: () => [
-        for (final c in _colDefs.where((c) => !c.required))
+        for (final c in _colDefs.where((c) => !c.required && _colAllowed(c)))
           DsMenuItem(
               value: c.key,
               label: c.label,
@@ -528,6 +534,8 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
     final sub = [
       if (item.productCode.isNotEmpty) item.productCode,
       if (item.spec.isNotEmpty) item.spec,
+      // 单价（成本进价）仅管理员可见（2026-07-06 用户拍板）
+      if (_isAdmin && item.unitPrice != null) _fmtCost(item.unitPrice!),
     ].join(' · ');
     return MCard(
       onTap: item.productId != null ? () => _openEditor(item) : null,
@@ -626,8 +634,9 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
             .toList();
 
         final hidden = _hiddenCols ?? <String>{};
-        final visibleCols =
-            _colDefs.where((c) => !hidden.contains(c.key)).toList();
+        final visibleCols = _colDefs
+            .where((c) => !hidden.contains(c.key) && _colAllowed(c))
+            .toList();
 
         final mobile = context.isMobile;
         // 原型 .main{padding:22px 26px}：桌面整页留白统一在此；窄屏保持紧凑。
@@ -715,7 +724,8 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
                         ),
                         MKpiItem(
                           label: '库存货值',
-                          value: summary != null
+                          // 货值=成本口径，非管理员后端抹零，前端显示占位
+                          value: _isAdmin && summary != null
                               ? yuanWan(summary.stockValue)
                               : '—',
                           delta: _mDeltaText(valDelta, valTone),
@@ -752,8 +762,9 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
                     ),
                     DsKpi(
                       title: '库存货值',
-                      value:
-                          summary != null ? yuanWan(summary.stockValue) : '—',
+                      value: _isAdmin && summary != null
+                          ? yuanWan(summary.stockValue)
+                          : '—',
                       icon: LucideIcons.database,
                       tone: DsKpiTone.ok,
                       delta: valDelta,

client/lib/widgets/product_editor_drawer.dart

@@ -11,6 +11,7 @@ import 'package:go_router/go_router.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
 
+import '../core/auth/auth_state.dart';
 import '../core/config/app_config.dart';
 import '../core/utils/dialog_util.dart';
 import '../core/responsive/responsive.dart';
@@ -356,10 +357,14 @@ class _ProductEditorDrawerState extends ConsumerState<_ProductEditorDrawer> {
         b('${_fmtQty(widget.qty!)} ${widget.unit ?? p.unit}'.trim())
       ));
     }
+    // 成本仅管理员可见（与库存列表/出库同口径）；p.purchasePrice 兜底也要一并门控
+    final isAdmin = ref.watch(isAdminProvider);
     final cost = widget.cost ?? p.purchasePrice;
-    if (cost != null && cost > 0) rows.add(('成本价（单瓶）', b(_fmtMoney(cost))));
-    if (widget.qty != null && cost != null && cost > 0) {
-      rows.add(('总成本价', b(_fmtMoney(widget.qty! * cost))));
+    if (isAdmin && cost != null && cost > 0) {
+      rows.add(('成本价（单瓶）', b(_fmtMoney(cost))));
+      if (widget.qty != null) {
+        rows.add(('总成本价', b(_fmtMoney(widget.qty! * cost))));
+      }
     }
     if ((widget.status ?? '').isNotEmpty) {
       rows.add((

client/test/golden/inventory_list_golden_test.dart

@@ -242,6 +242,8 @@ List<Override> _overrides() => [
       productSeriesListProvider.overrideWith(() => _FakeSeriesNotifier()),
       productSpecListProvider.overrideWith(() => _FakeSpecNotifier()),
       isReadonlyProvider.overrideWithValue(false),
+      // 成本列/货值/单价仅管理员可见——golden 基准取管理员形态
+      isAdminProvider.overrideWithValue(true),
       inventorySummaryProvider.overrideWith((ref) => const InventorySummary(
             skuCount: 1284,
             stockValue: 2640000,

client/test/golden/inventory_list_mobile_golden_test.dart

@@ -165,6 +165,8 @@ List<Override> _overrides() => [
       productSeriesListProvider.overrideWith(() => _FakeSeriesNotifier()),
       productSpecListProvider.overrideWith(() => _FakeSpecNotifier()),
       isReadonlyProvider.overrideWithValue(false),
+      // 成本列/货值/单价仅管理员可见——golden 基准取管理员形态（卡片含单价）
+      isAdminProvider.overrideWithValue(true),
       inventorySummaryProvider.overrideWith((ref) => const InventorySummary(
             skuCount: 1284,
             stockValue: 2640000,